ORM在eclipse上的搭建

首先建立一个ormdemo命名为ormtest。然后新建lib文件夹导入相关jar包。

首先导入hibernate的jar包：

然后导入日志类包：

以及连接mysql的驱动jar包：

最终使用如下jar包：

然后创建一个Visitor类：

public class Visitor {
    private Integer id;    
    private String name;   
    private Integer age;   
    private String sex;    
    private String message;   
    
    public Integer getId() {
        return id;
    }
   
    public void setId(Integer id) {
        this.id = id;
    }
    
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public Integer getAge() {
        return age;
    }
    
    public void setAge(Integer age) {
        this.age = age;
    }
    
    public String getSex() {
        return sex;
    }
    
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    public String getmessage() {
        return message;
    }
    
    public void setmessage(String message) {
        this.message = message;
    }
    
    @Override
    public String toString() {
        return "Visitor [id=" + id + ", name=" + name + ", age=" + age + ", sex=" + sex + ", message=" + message + "]";
    }  
}

编写映射文件Visitor.hbm.xml：

<?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE hibernate-mapping PUBLIC 
       "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
       "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
  <hibernate-mapping>
      <class name="com.hck.entity.Visitor" table="Visitor">
          <id name="id" column="id">
             <generator class="native"/>
          </id>
          <property name="name" column="name" type="string"/>
          <property name="age"  column="age"  type="integer"/>
          <property name="sex"  column="sex"  type="string"/>
          <property name="message" column="message" type="string"/>
      </class>
  </hibernate-mapping>

编写核心配置文件hibernate.cfg.xml:

<?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
  <hibernate-configuration>
         <session-factory>
              <property name="hibernate.dialect">
                org.hibernate.dialect.MySQLDialect
              </property>
              <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
              <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/db_blog</property>
              <property name="hibernate.connection.username">root</property>
              <property name="hibernate.connection.password">001122</property>
              <property name="format_sql">true</property>
              <mapping resource="com/hck/entity/visitor.hbm.xml"/>
         </session-factory>
  </hibernate-configuration>

最后编写单元测试类:

public class HibernateTestDemo {
    Configuration config;
    SessionFactory sessionFactory;
    Session session;
    Transaction transaction;
    @Before
    public void setUp()
    {
      config=new Configuration().configure();
      sessionFactory=config.buildSessionFactory(); 
      session=sessionFactory.openSession();
      transaction=session.beginTransaction();
    }
    @Test
    public void insert()
    {   
      Visitor visitor=new Visitor();
      visitor.setId(1);
      visitor.setName("david");
      visitor.setAge(18);
      visitor.setSex("m");
      visitor.setmessage("[email protected]");
      session.save(visitor);
    }
    @Test
     public void delete()
     {
        Visitor visitor=(Visitor)session.get(Visitor.class, 1);
        session.delete(visitor);
     }
    @Test
    public void select()
    {
        Visitor visitor=(Visitor)session.get(Visitor.class, 1);
        System.out.println(visitor);  
    }
    @Test
    public void update()
    {   
      Visitor visitor=new Visitor();
      visitor.setId(1);
      visitor.setName("david");
      visitor.setAge(18);
      visitor.setSex("m");
      visitor.setmessage("[email protected]");
      session.saveOrUpdate(visitor);
    }
    @After
    public void closeTransaction()
    {
      transaction.commit();
      session.close();
      sessionFactory.close();
    }
}

执行mysql操作如下：